Is it possible to get a solar filter for a Meade DS-90 90mm refractor?

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Moraliser Overtax Porn

You can always make a filter out of Baader solar filter material. You can order it and they will send you directions on how to make the cell to fit your telescope...it is very easy to make. You can order it from many places...here is one.

Baader solar film order

An astronomy club I once belonged to found a place that sold 5inch square sheets for a lot less. A 5 inch sheet would be adequate for a DS90 filter, but I can't remember who we ordered from.

Rob

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"Crackpot theories 1 : Regular theories a billion." Fry

I had a page on how to make one....

My site has recently been destroyed however.....

But basicly what you do is- you get the baader film get a peice of cardboard that covers the objective lens of your scope, and cut a hole off center and put the film there.

I suppose thats the instructions on the film.


At 90mm you could probobly just cover the whole objective lens with the baader film.

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If this writing is blue you're going too fast!

What you want is a PST (Personal Solar Telescope) from, IIRC, Coronado instruments (~$500). It contains a H-Alpha filter and is astonishing. I tried one out a few days ago and you could see not only solar prominances, butu also some of the orange peel effect on the surface.

I'd love one of them

They had one at last astrofest, but I was to small to see and only had breif glimpses....

If I won the lotto.....

Just had a look at the sun through my scope' with the white light filter nothin interesting atm.

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If this writing is blue you're going too fast!

Thanks! I think I'll try that!

EDIT: I mean I'll try the BAADER filter. I'm not going to get another scope just yet.

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Moraliser Overtax Porn

Another question: If I make a filter with the BAADER material, can I then get a hydrogen-alpha filter to place in the eyepiece?

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Moraliser Overtax Porn

I have a PST It is a great little instrument.

As to your question, I assume you are referring to the hydrogen-alpha filters you can buy from companies such as Lumicon that screw into an eyepiece. Sadly, the answer is no. These eyepiece filters have fairly wide bandpasses and are intended primarily for nebula viewing. You really need sub-angstrom bandpass to make a good solar h-alpha filter (in addition to filtering out almost all of the light!)

You can see the info and a filter response curve for a Lumicon night sky h-alpha filter here.

Lumicon h-alpha filter

Note that the filter transmits over 90% of the light up to 700nm and this continues well into the infared as well (only an issue for CCD cameras that will detect infrared light).

Rob

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"Crackpot theories 1 : Regular theories a billion." Fry

Ok. I guess I'll have to wait to get a solar scope to see hydrogen alpha. I won't complain, though, seeing the sun in white light will be plenty for me!

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Moraliser Overtax Porn

I got my solar filter at Thousand Oaks optical. You call them, talk to a real person, and they make the filter to fit your scope. I've been very happy with mine. I'll try to find a link.
Edited to add this link.

Thanks, but I think I'm going to go with the BAADER, mainly because of the (low) price.

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Moraliser Overtax Porn

Here is a site with smaller pieces and good prices:
http://www.dracoproductions.net/baad...r_material.htm

I have a DS-90 and the solar filter for the orion 80 ED fits perfectly.
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At one time I had a post with boatloads of photos here on how to build solar filters...but the website died...

You can go to Baader's website, where there's a page with DIY instructions.

My versions were a bit different, in that you could switch out the material you used.

I built a double set of filters for a pair of 10x50 binoculars, a 3" reflector, and a 4 1/2" reflector, all using the same basic (but scaled) construction method -- and each filter had both the Baader AstroSolar and Thousand Oaks material that could be switched.

Baader filters give a very bright silvery-white image. Thousand Oaks gives a much more mellow golden color. I'm partial to the Thousand Oaks because it's easier on my eyes.

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"If a tree is cut down in the rainforest, and is used to make paper to print a book, and the book is really bad, and there's nobody that will read it, do you still hear a sucking sound?"
Charlie in Dayton, A.AsC.